Journal
PHYSICAL REVIEW B
Volume 93, Issue 22, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.93.224421
Keywords
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Funding
- National Science Foundation of the USA [ECCS-1305586]
- US Army TARDEC, RDECOM
- DARPA MTO/MESO [N66001-11-4114]
- Center for NanoFerroic Devices (CNFD)
- Nanoelectronics Research Initiative (NRI)
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [1305574] Funding Source: National Science Foundation
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It is demonstrated theoretically that a thin layer of an anisotropic antiferromagnetic (AFM) insulator can effectively conduct spin current through the excitation of a pair of evanescent AFM spin wave modes. The spin current flowing through the AFM is not conserved due to the interaction between the excited AFM modes and the AFM lattice and, depending on the excitation conditions, can be either attenuated or enhanced. When the phase difference between the excited evanescent modes is close to pi/2, there is an optimum AFM thickness for which the output spin current reaches a maximum, which can significantly exceed the magnitude of the input spin current. The spin current transfer through the AFM depends on the ambient temperature and increases substantially when temperature approaches the Neel temperature of the AFM layer.
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